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To: longnshort who wrote (42589)4/30/2013 3:59:36 PM
From: DallasKevin  Read Replies (1) | Respond to of 85487
 
webcitation.org

This is from the Encarta Encyclopedia, which you should trust. The links are there citing the scientific expeditions and the evidence.

"Evidence from the comparative study of Native American languages, as well as analysis of some genetic materials, suggests that these earliest migrations may have taken place around 30,000 years ago. "

"For example, in the Yukon, in what is now Canada, bone tools have been discovered that have been radiocarbon-dated to 22,000 BC. Campfire remains in the Valley of Mexico, in central Mexico, have been radiocarbon-dated to 21,000 BC, and a few chips of stone tools have been found near the hearths, indicating the presence of humans at that time. "